Puppy teeth are very sharp and needle-like. This is nothing unusual. After about 5 months you will notice they fall out and are replaced by adult teeth (much more dull). Don't be afraid of him swallowing the teeth that come out. This is also normal. If you can collect them and dispose of them, Great. But don't freak.
my boston terriers are the same way and some of her teeth didnt fall out so some grew in behind the others to